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Preparation method of slag-based geopolymer-iron oxide semiconductor composite catalyst and application in dye degradation

A technology of inorganic polymers and composite catalysts, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of no literature and patent reports on the degradation of preparation dyes, and achieve a simple process. The effect of easy operation, short degradation time and high degradation efficiency

Inactive Publication Date: 2012-09-26
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] By consulting a large number of patents and literature, no literature and patent reports on the preparation of alkali-activated slag-based inorganic polymer-oxide semiconductor composite catalysts and the use of the catalyst in dye degradation have been found.

Method used

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  • Preparation method of slag-based geopolymer-iron oxide semiconductor composite catalyst and application in dye degradation
  • Preparation method of slag-based geopolymer-iron oxide semiconductor composite catalyst and application in dye degradation
  • Preparation method of slag-based geopolymer-iron oxide semiconductor composite catalyst and application in dye degradation

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Experimental program
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Effect test

Embodiment 1

[0048] Accurately weigh 1500g of slag raw material, take this as the basis of measurement (100%), adopt the external mixing method, the dosage of activator sodium silicate is 10% of the weight of slag, the mass ratio of water to slag (also called water slag ratio) is 0.32. Pour the slag powder into the double-rotation and double-speed slurry mixer for stirring and dispersing; add the sodium silicate aqueous solution and stir at a high speed to form a uniformly mixed slurry; put the slurry into a triple mold of 40mm×40mm×160mm, Vibrate on a mortar vibrating table, and scrape it flat with a scraper to obtain a formed slurry test block. Put the formed test block into a standard curing box for 1 day of curing, then remove it from the mold, put it in a curing room for 7 days at room temperature, then put it into a sealed plastic bag, and maintain it at 65°C for 24 hours. The compressive strength of the test block is 86.0 MPa, the flexural strength is 2.0MPa; crush the test block a...

Embodiment 2

[0051] All operation steps are identical with embodiment 1, just accurately weigh solid Fe(NO 3 ) 3 9H 2 The amount of O was changed to 7.5909 g and dissolved in 20 mL of distilled water; Fe 2 o 3 Inorganic polymer-iron oxide semiconductor composite catalyst with a theoretical loading of 5% (marked as 5Fe 2 o 3 -polymer).

Embodiment 3

[0053] All operation steps are identical with embodiment 1, just accurately weigh solid Fe(NO 3 ) 3 9H 2 The amount of O was changed to 15.1818 g and dissolved in 20 mL of distilled water; Fe 2 o 3 Inorganic polymer-iron oxide semiconductor composite catalyst with a theoretical loading of 10% (marked as 10Fe 2 o 3 -polymer).

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Abstract

The invention discloses a preparation method of a slag-based geopolymer-iron oxide semiconductor composite catalyst and an application in dye degradation. The preparation method relates to two-step reaction of synthesis of the geopolymer and loading of iron oxide semiconductor, and is characterized in that the industrial solid waste slag is taken as raw materials and is synthetized into slag-based geopolymer binding material under the excitation of sodium silicate, and the slag-based geopolymer binding material is soaked in ferric nitrate water solution and is roasted to form the slag-based geopolymer-iron oxide semiconductor composite catalyst. The semiconductor composite catalyst is used in degradation reaction of photocatalytic congo red dye and methylene blue dye, the highest degradation rate can reach up to 100%, the degradation efficiency is high, and secondary pollution is not caused; and the semiconductor composite catalyst has a simple preparation process, is low in cost, and can realize large-scale preparation.

Description

technical field [0001] The invention belongs to the preparation of an inorganic catalyst and its application in the field of waste water treatment, in particular to the preparation of a slag-based inorganic polymer-iron oxide semiconductor composite catalyst and its application in dye degradation. Background technique [0002] Blast furnace slag is a waste residue discharged from the blast furnace when smelting pig iron. According to incomplete statistics, for every ton of pig iron produced, 1.0-1.2 tons of blast furnace slag can be discharged; when iron-rich ore is used for ironmaking, 0.25 tons of blast furnace slag can be discharged for the production of 1 ton of pig iron. More than 60 million tons, distributed in 17 provinces, municipalities and autonomous regions of our country. The accumulation of these waste residues not only takes up a large amount of land, but also pollutes the environment. Therefore, the comprehensive utilization of high added value of slag is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/055C02F1/30
Inventor 张耀君刘礼才倪路路王丙丽王亚超
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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